Respostas

2013-11-21T23:08:02-02:00
X→ base
y→ altura

P=2x+2y
P=2(x+y)
P/2=x+y
60/2=x+y
30=x+y

x=2y
30=2y+y
30=3y
30/3=y
y=10 → altura

x=2y
x=2.10
x=20 → base